Power driving mechanism.



W. U. VIVABTTAS.

POWER DRIVING MECHANISM.

(Application filed iwov. 2a, 1900.

No. 673,102. Patented Apr. 30, l90l.

(No Model.)

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No. s73,|02. 'Patented Apr. 30;l90I.

w. o. .VIVARTTAS. POWER DRIVING MECHANISM.

(Application filed Nov. 23, 1900.) (In Iodul.)

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UNITED STATES PATENT OFFICE.

WILLIAM 0. VIVARTTAS, OF WEEHAWKEN, NEW JERSEY, ASSIGNOR TO THE H. B. SMITH MACHINE COMPANY, OF SMITHVILLE, NEW JERSEY.

POWER DRIVING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 73,102, dated April 30, 1901. Application filed November 23, 1900. Serial No. 37,422. (No model.)

ism where friction-disks are used as the driv-' ing and driven means, andcomprises certain improvements whereby theoperation of this class of driving mechanism is made more certain and may be readily regulated.

My invention is particularly applicable to that class of such mechanism in which there are two driving-disks and a driven disk between said driving-disks and in which the driving-disks are approached and withdrawn from the driven disk.

It consists, essentially, in providingtension devices which act to force said driving-disks.

against the driven disk and maintain operative contact and withdrawing said disks by positive action against these tension devicesthat is, there are tension devices which are rendered active or inactive to approach or withdraw the driving-disks from the drive-n disk.

My invention further consists in the details hereinafter fully described. 7

I will now describe the embodiment of my invention illustrated in the'accompanying drawings, in which- Figure 1 is a plan view of mechanism embodying my invention. Fig. 2 is a side elevation of same. Fig. 3 is a section on line 3 3, Fig. 1. Fig. 4 is a section on line 4.4, Fig. 1. Fig. 5 is a detail of cam-frame and yoke.

A is the main driving-shaft, upon which is the loose pulley a andthe fixed pulley 0.. The shaft is driven; from any appropriate source of power. Upon one end of this shaft A is the pulley B and upon the other end the pulley B. The pulley B by means of the straight belt I) is connected with the pulley G upon the shaft 0. Uponthis shaft cis the friction-disk D. The Policy B by means of the crossed belt I) is connected with the pulley 0 upon the shaft 0. Upon thisshaft c is the friction-disk D. Between the disks 'D and D is the friction-disk E upon the shaft e. Upon the outer'end of the shaft e is the bevel-gear e, gearing with the bevel-gear e on the shaft 6 Upon the outer end of the shaft 6 is the pulley 6 from which a belt 6 leads to the point of application of power.

As may be seen from thedescription up to this point, the friction-disks D and D are each separately driven from a common source of power, and both together drivethe driven disk E always in the same direction. belts form an independent and flexible connection from the common source of power, so that the driving of each disk is not affected by the driving of the other.

The means and mechanism by which the The disk E is moved across the faces of the disks nected to shaft H is the crank h, which cran k is connected by the link h with the operatinglever h By'moving this lever h the shaft H is rocked, and through the medium of lever G, arms g, and ring ,F the disk E may be moved along the shaft 6, and thus across the faces of the disksv D and D. So long as the disk E is on theside of the centers of disks D and D shown in Fig. l' the movement of the disk E will maintain the direction of rotation constant, but vary the speed of rotation. By moving the disk to the opposite side of said centers the direction of rotation will be changed and its movement on that side will vary the speed of rotation in that direction of. rotation.

In order to move the disks D and D away from the disk E and also to cause yielding contact between the disks D and D and E, I employ the following means and mechanism: The shafts c and c are supported in their respective bearings c and 0 so as to be capable of a longitudinal movement. Each disk D and D has a hub or collar'llt' respectively, fixedly attached to the shafts c and respectively. On the shaft 0, beyond the collar or hub t', is a collar or ringj, and on the shaft 0, beyond the collar 0 is a corresponding ring or collar 7' the collars or rings being fixedly attached to the shafts c and 0, respectively. Surrounding the shafts c and 0, between the hubs or collars i and t and rings [0 j and 7' are rin'gsq and g, respectively. To

these rings (1 and q are connected yokes J and J, respectively. The yoke J is secured to shaft K and the yoke J to shaft K. From a crank is, secured to shaft K, extends the leverL, having the adjustable weight Z. From a crank 7c, secured to the shaft K, extends the lever L, having the adjustable weight Z. A yoke M surrounds both levers L and L. On each upper end of said yoke M is a roller m. N is a cam-frame having the inclined sides n and n. One roller m rests on the side n and the other roller m on the side n. Connected to the cam-frame N is the link 0, connected to one end of a bell-crank p. The other end of the bell-crank is connected to a link 13, which is connected to the operatinglever P.

When the operating-lever Pis moved so as to cause the rollers m to move up on the sides 01 and n, the yoke M is lifted, lifting the levers L and L, and withdraws the disks D and D from disk E. When the leverPis moved in the opposite direction, the rollers m will slide down the sides n and 71., allowing the yoke M to descend, allowing the levers L and u L under the action of the weights Z and Z to drop, bringing the disks D and D into contact with the disk E. As may be seen, the disks D and D are brought into contact and maintained in contact with the disk E by means of the weights 1 and Z, while the withdrawal of these disks D and D is positive. Thus the contact of disks D and D with disk E is a yielding contact. Also each disk D and D is independently held in contact, and the contact of each can independently yield to compensate for irregularities or other troubles, it being only necessary that the yoke M should fall sufficiently to allow free movement of these weighted levers L and L. The weights acting to move these levers in the manner thus described and to produce the yielding independent contact between the disks D D and disk E is only one means of accomplishing this, and I do not intend to limit myself to the use of weights as the means of accomplishing this.

The driving-surface of disks D and D may be of metal and the driven surfaces of disk E of fiber, paper, or other suitable material, or the driving-surface of disks D and D may be such lastmentioned materials and the driving-surface of disk E of metal.

Having now fully described my invention, what I claim, and desire to protect by Letters Patent, is-

1. The combination with two driving friction-disks and means for driving them in opposite directions, of an intermediate driven disk, an independent tension device for each driving-disk tending to move and hold its corresponding disk in driving contact with the driven disk, and shifting means for Withdrawing the driving-disks from contact with the driven disk against the action of said tension devices.

2. The combination, with two driving friction-disks, and means for driving them in opposite directions, of an intermediate driven disk, an independent tension device acting upon each driving-disk and tending to move and hold its corresponding disk with the required pressure in driving contact with the driven disk, and shifting devices for simultaneously rendering both tension devices 0perative and inoperative.

3. The combination, with two driving fric- I tion-disks, and means for driving them in opposite directions, of an intermediate driven disk, an independent weighted lever connected with and acting upon each driving-disk and tending to move and hold it with the required pressure in driving contact with the driven disk, and shifting devices for simultaneously lifting both weighted levers, thereby withdrawing the driving-disks from contact with the driven disk.

4. The combination, with two driving friction-disks and means for driving them in opposite directions, of an intermediate driven disk, a weighted lever connected with and acting upon each driving-disk and tending to move and hold it with the required pressure in driving contact with the driven disk, acam, rollers engaging the same, a yoke connected with the rollers and engaging the weighted levers, and means for moving said cam, thereby 'lifting the weighted levers and withdrawing the driving-disks out of contact with the driven disk.

5. The combination with two driving-disks and means for driving them in opposite directions, of an intermediate driven disk, devices for moving respectively the two drivingdisks into and out of driving contact with the driven disk, a separate rock-shaft for each driving device, each device being secured to its corresponding rock-shaft, a weighted lever secured to each rock-shaft and tending to -move and hold the corresponding driving-disk with the required pressure in driving contact with the driven disk and means for simultaneously lifting both weighted levers, thereby withdrawing the driving-disks out of contact with the driven disk.

6. The combination, with two driving-disks and means for driving them in opposite directions, of an intermediate driven disk, devices for moving respectively the two drivingdisks into and out of driving contact with the driven disk, each device being secured to a separate rock-shaft, a weighted lever secured to each rock-shaft and tending to move and hold the corresponding driving-disk with the io bers, of an independent tension device for each of the drivers and means whereby both tension devices can be simultaneously withdrawn, thereby breaking contact between the driving and the driven disks.

In testimony of which invention I have here-' I 5 unto set my hand.

' WM. 0. VIVARTTAS. Witnesses:

RICHARD B. EQKMAN,

HARVEY THOMAS. 

